Square pleats. Available in conventional needlefelt too. Standard size 400mm dia X 1000 / 1200mm long. Filter area 5 - 6 times higher than conventional cylindrical bag. Multiple lengths possible. 99.99% filtering efficiency. The Evolution of Filtration Transition from Conventional to the 'Next Generation' Units Selection of Filtration Technique: Depth or Surface? Fabric Finishes Why F. Harley is best filtration Provider?   © F. Harley & Company Private Limited. All rights reserved.